Gas-stove.



C. P. HENSLEY.

GAS STOVE.

APPLICATION FILED JUNE 1o, 1908.

Patented July 13, 1909.

nvan tou ey www i CALVIN P. HENSLEY, OFlSAN FRANCISCO, CALIFORNIA.

GAS-STOVE.

Specication of Letters Patent.

Patented July 13, 1909.

Application led June 10, 1908. Serial No. 437,784.

To all whom it may concern:

Be it known that I, CALVIN' P. HENsLEY, citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Gas-Stoves, of which the following is a specification.

This invention relates to gas stoves, and pertains especially to gas stoves and ranges for cooking purposes.

The object of the invention is economy, and the utilization of the heat to the best possible advantage, and the prevention of the escape of any fumes or noxious vapors into the room in which the stove is located.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figure 1 is a section on line :r-x of Fig. 2. Fig. 2 is a plan partly in section.

A represents the frame of the stove, which is of suitable size, shape, and construction, and mounted in any appropriate manner, as on the legs 2. This frame is preferably composed of a bottom plate 3, a to plate 4, the top cornice plate 5, the vertica corner angle plates 6, and the sheet-metal sides 7 all suitably riveted or bolted together to form a rigid structure, and inclosing the several combustion chambers or fire-pots 8. These res pots are formed by the sheet-metal cylinders 9 which are bolted or otherwise secured at the bottom to the annular flanges 10 and the base plate 3, and at the top they are continued y the outwardly flared castings 1]., which latter abut against the under side of the top plate 4 and are riveted or otherwise secured to the cylinders 12 which are suit-` ably spaced from and arranged concentric with respect to the inside casings 9. The annular space between the casings 9-12 is filled with a suitable insulating material 13, such as sand or asbestos fiber, or the like. The combustion chambers 8 are closed at the top by means of the removable stove covers 14. If desired, one stove cover may seat inside of an annular cover ring 15 to permit vessels of diderent sizes to be set into the :tirepot. 'lhe top castings 11 are flared outwardly, as shown, each in the form of a frustum of a cone. At suitable points near the bottom of the lire-pot are provided draft openings 16 leading from the interior of the stove portion into the combustion chamber.

The stove is preferably provided with four fire-pots each with its separate cover 14, each fire-pot forming a heating unit, and the several units being connected so that the heat and the products of combustion will circulate through two or more flre-pots to the outlet 17. As here shown, a burner 18 is arranged in each of the front lire-pots', and gas is admitted to these burners from any suitable source of su ply through the burner pipe 19. Each front fIire-pot is connected near its top with the fire-pot in rear through a suitable iiue 20, and the two rearmostfire-pots are similarly connected by the flue 21. If desired, the heat and products of combustion issuing through the outlet 17 may be coni ducted by a ne 22 to an oven 23 suitably supported at the rear of and above the stove, and thence to the stack pipe 24.

The result of the foregoing construction is that all the fire-pots are inclosed, except forthe draft openings 16 referred. to, and the outlet 17 of the last {ire-pot. There is no waste or surplus heat allowedv to escape into the room, and the heat is used successively in the several pots. The insulation 13 around each pot conserves all the heat within the stove, and there is no loss by radiation into the room, and the pots will stay hot for quite a while after the gas has been turned off. With all other gas stoves now in use, of which I have knowledge, they cool oii immediately on the gas being cut off. With my invention the surplus radiation heat generated While the gas is burning is conserved so that it will maintain water or articles of food hot for some time. By this stove only those ortions on which cookin is directly ta ring place are heated 5 in ot 1er words, only the portions of the stove represented by the stove covers are heated, all thc heat being thus concentrated on limited areas, 'rather than being distributed indiscrirninately` over the Whole top of the stove, as ordinarily. No noxious 'fumes or waste products of combustion are allowed to enter the room, and consequently there is a notable lack of grime and soot, present Where o en gas stoves are used.

l/Vhen the gas in a ront Vcombustion chamber is lighted, the confined heat will strike the cover of this chamber, or the pot or kettle which may be set into this combustion chamber. The surplus heat is thence led to the chamber next succeeding and in rear. In practice, I have been able frequently to cook or boil Water and maintain it at boiling point simply from this excess heat from the front chamber. If the chambers are connected up so that three chambers are heated from one burner, enough heat is passed into the third chamber to maintain articles at boiling point, or very near boiling point. By the use of this stove I have also been able to eHect a saving of 40% in fuel.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- A gas vstove comprising top and bottom plates, the bottom late having annular anges on its upper si e, cylindrical lire-pots secured to said lianges, flared castings secured to the top of said ire-pots and on which the top plate rests, said re-pots and castings inclosinf1r combustionv chambers7 casings of larger diameter inclosin the firepots, a filling of insulating material in the space between the casings vand the fire-pots, covers for the re-pots, flue connections between the several ire-pots, burners in the fire-pots at the front of the stove, and those {ire-pots at the rear of the stove having lue connections adapted to communicate with a stack.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit- IleSSeS.

CALVIN P. HENSLEY. Witnesses:

C. A. PENFIELD, CHARLES EDELMAN. 

